Harness operating means for looms



Aug. 25, 1953 F. N. FRANCIS ETAL 2,649,863

- Y HARNESS OPERATING MEANS FOR LOOMS Filed Jan. 5, 1951 INVENTORS C. L. FRANCIS 34?, Q

ATTORNEY F N. FRANCIS Patented Aug. 25, 1953 KUNITED S\TATES PATENT OFFICE, H 7 Q I HnnitEss orsnA'i i isz lffEnns-non noo'Ms I h Frank N. Francis, Greer, and Coleman L. Francis,

Greenville, S. C.

1 Claim.

An important object of the invention is toprovide means to prevent the cams separating from the rollers carried by the treadles which operates the harnesses.

A further object of the invention is to provide means of the above-mentioned character which is of simple construction and will not impair the normal operation of the treadles by the cams.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout same,

Figure 1 is a side elevation of the harness operating treadles and associated elements,

Figure 2 is a front end elevation of the harness operating treadles, associated elements being shown in elevation, parts broken away,

Figure 3 is a vertical section taken on line 3--3 of Figure 1,

Figure 4 is a side elevation of one cam, and.

Figure 5 is a side elevation of one treadle carried roller.

In the drawings, where for the purpose of 11- lustration is shown a preferred embodiment of our invention, the numeral I designates a horizontal shaft mounted upon the loom frame near its bottom, and II and I2 designate treadles. which are pivotally mounted upon the shaft III to swing in vertical planes. The treadle II is connected with one harness I3 by means including a strap l3 while the treadle I2 is connected with the other harness I4 by means including a strap I4. The two harnesses are connected at their tops in the usual manner by straps or the like which pass over pulleys so that the harnesses move in opposite directions. When the treadle I I moves its harness I3 downwardly, the treadle I2 moves upwardly so that its harness I4 may move upwardly. This is the conventional loom construction and no further description is deemed necessary.

Arranged near and above the treadles II and I2 is a horizontal cam shaft I extending transversely of these treadles. This cam shaft is driven in the usual manner, not shown. Rigidly mounted upon the cam shaft I5 to rotate therewith, are cams or eccentrics I6 and I1, arranged respectively directly over the treadles II and I2.

The high points of the cams I6 and l l are spaced degrees. Formed integral with the periphery of each cam I6 and I! is an annular tongue or flange I8, arranged at the longitudinal center of the periphery of the cam. The periphery of the cam is otherwise longitudinally fiat. Rotatably mounted upon each treadle II and I2 near its longitudinal center is a roller I9, having an annular groove 29 to receive the tongue I 8. The groove 29 is at the longitudinal center of the Deriphery of the roller and such periphery is 1ongitudinally flat, save for the groove 20. The arrangement is such that the peripheries of the cams I6 and I! engage with the peripheries of the rollers I9, and the rotation of the cams causes the treadles II and I2 to be swung vertically in opposite directions, and the harnesses reciprocate in the usual manner. The grooves 20 are. slightly deeper than the tongues or flanges I8, and do not interfere with the engagement of the peripheries of the cams and rollers, but since the tongues I8 travel within these grooves 20, there can be no perceptible relative axial movement between each cam and its roller, and the roller cannot therefore disengage the cam.

It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described our invention, we claim:

A loom comprising, mechanism including harnesses which are vertically movable in opposite directions. vertically swinging treadles arranged beneath the harnesses, means for connecting the free end portion of one treadle with one harness. means for connecting the free end portion of the other treadle with the other harness, the free end portions of the treadles moving simultaneously in opposite directions, rollers mounted upon the treadles near their longitudinal centers. each roller having a substantially flat wide periphery and provided upon such periphery adjacent to the longitudinal center of the periphery, with an annular narrow groove, the rollers being held against axial movement with relation to the treadles and the rollers moving vertically with the vertical swinging movement of the treadles, a cam shaft extending transversely of the treadles above and adjacent to the rollers. cams mounted upon the cam shaft and held against axial movement with relation thereto. the cams being arranged above and adjacent to the rollers, each cam having a substantially flat wide periphery and provided at substantially the longitudinal center of the periphery with an annular narrow tongue, the cam having its neriphery contacting with and operating against the periphery of the adjacent roller to move the roller and treadle vertically, such cam having its annular tongue entering the groove of the adjacent roller, said groove being deeper than the References Cited in the file of this patent UNITED STATES PATENTS 5 Number radial dimension of the tongue, the tongue and 10 groove preventing separation of the cam and.

Number Name Date Meier Dec. 23, 1890, Stokes et al Apr. 18, 1893 Lacey Feb. 14, 1905 FOREIGN PATENTS Country Date Germany Dec. 21, 1925 Germany Feb. 2, 1943 

